Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and develop scalable backend systems that power innovative financial products.
- Company: Join a dynamic tech company focused on financial inclusion.
- Benefits: Competitive salary, stock options, paid leave, and skill development.
- Why this job: Make a real impact on how people manage their money with cutting-edge technology.
- Qualifications: 5+ years in backend development, fluent in Java, and strong communication skills.
- Other info: Collaborative team environment with opportunities for personal and professional growth.
The predicted salary is between 48000 - 72000 £ per year.
As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money.
What You'll Be Doing
- The work will focus on greenfield development and improvement of existing systems.
- Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity).
- Our technology stack is based predominantly on Java 25 on the backend with Postgres database.
- We rely on Spring Boot for quick and quality delivery.
- We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery.
What you'll need
- 5+ years of experience in Backend development, with fluency in Java.
- Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines.
- Quick learner with an ambitious and results driven personality, with excellent communication skills (English fluency, verbal and written).
- Track record of building complex products that millions of people use in hypergrowth startups.
Benefits
- Competitive salary.
- Sign-on stock options bonus, so you become part of the success of the company.
- Discretionary performance bonus (stock options).
- Paid annual leave.
- Own the development process that will face on the customer's impact.
- Latest technology to work with.
- Strong team that will help you improve your skills.
Backend Engineer employer: Castleisland
Contact Detail:
Castleisland Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Backend Engineer
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work in backend development. A friendly chat can lead to insider info about job openings or even referrals that could give you a leg up.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving REST APIs and microservices. This is your chance to demonstrate your expertise in Java and Spring Boot, so make it shine!
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and system design knowledge. Practice common backend engineering problems and be ready to discuss your past projects and how you tackled challenges.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who are proactive and engaged with our company.
We think you need these skills to ace Backend Engineer
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Backend Engineer role. Highlight your experience with Java, REST APIs, and any relevant projects that showcase your skills in building scalable systems. We want to see how you can contribute to our mission!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about backend development and how your experience aligns with our goals at StudySmarter. Keep it concise but impactful – we love a good story!
Showcase Your Projects: If you've worked on any interesting projects, especially those involving microservices or TDD, make sure to mention them. We’re keen to see how you’ve tackled challenges and what solutions you’ve come up with. It’s all about demonstrating your problem-solving skills!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates. Plus, it shows you’re serious about joining our team!
How to prepare for a job interview at Castleisland
✨Know Your Tech Stack
Make sure you’re well-versed in Java 25, Spring Boot, and Postgres. Brush up on your knowledge of REST APIs and microservices, as these are crucial for the role. Being able to discuss your past experiences with these technologies will show that you’re ready to hit the ground running.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in backend development and how you overcame them. Use examples that highlight your ability to write clean code and implement TDD and DDD principles. This will demonstrate your pragmatic approach to development.
✨Communicate Clearly
Since excellent communication skills are a must, practice explaining complex technical concepts in simple terms. Be ready to articulate your thought process during problem-solving scenarios. This will help the interviewers see how you collaborate with teams and share ideas effectively.
✨Align with Company Values
Research the company’s mission around financial inclusion and be prepared to discuss how your work can contribute to that goal. Showing that you understand and resonate with their vision will set you apart as a candidate who is not just looking for a job, but is genuinely interested in making an impact.
